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Topological magnon-photon interaction for cavity magnonics
Jongjun M. Lee, Myung-Joong Hwang, Hyun-Woo Lee
The study of cavity magnonics and topological insulators has made significant advances over the past decade, however the possibility of combining the two fields is still unexplored…
Cavity magnonics with easy-axis ferromagnet: Critically enhanced magnon squeezing and light-matter interaction
Jongjun M. Lee, Hyun-Woo Lee, Myung-Joong Hwang
Generating and probing the magnon squeezing is an important challenge in the field of quantum magnonics. In this work, we propose a cavity magnonics setup with an easy-axis ferroma…
Large-Scale Schrödinger-Cat States and Majorana Bound States in Coupled Circuit-QED Systems
Myung-Joong Hwang, Mahn-Soo Choi
We have studied the low-lying excitations of a chain of coupled circuit-QED systems, and report several intriguing properties of its two nearly degenerate ground states. The ground…
Coupling Circuit Resonators Among Themselves and To Nitrogen-Vacancy Centers in Diamond
Myung-Joong Hwang, Mahn-Soo Choi
We propose a scheme to couple NV centers in diamond through coplanar waveguide resonators. The central conductor of the resonator is split into several pieces which are coupled str…
Variational study of a two-level system coupled to a harmonic oscillator in a ultrastrong coupling regime
Myung-Joong Hwang, Mahn-Soo Choi
The nonclassical behaviors of a two-level system coupled to a harmonic oscillator is investigated in the ultrastrong coupling regime. We revisit the variational solution of the gro…
Superconducting Qubits Coupled to Torsional Resonators
Myung-Joong Hwang, Jae-Hyuk Choi, Mahn-Soo Choi
We propose a scheme of strong and tunable coupling between a superconducting phase qubit and nanomechanical torsional resonator. In our scheme the torsional resonator directly modu…